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How many valence electrons does bromine (Br) have?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Which of the following atoms has five valence electrons?
A
O (Oxygen)
B
F (Fluorine)
C
N (Nitrogen)
D
C (Carbon)
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Recall that valence electrons are the electrons in the outermost shell of an atom, which participate in chemical bonding.
Identify the group number of each element in the periodic table, as the group number often corresponds to the number of valence electrons for main-group elements.
Oxygen (O) is in group 16, so it has 6 valence electrons.
Fluorine (F) is in group 17, so it has 7 valence electrons.
Nitrogen (N) is in group 15, so it has 5 valence electrons, which matches the question's requirement.
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